<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="target.html">
        <!-- autocomplete关闭自动补全 -->
        <!-- readonly 将表单项设置为只读，数据会提交 -->
        <!-- disabled 将表单项设为禁用，数据不会提交 -->
        <!-- autofocus 设置表单项自动获取焦点 -->
        <input type="text" name="username" value="hellp" >

        <br><br>

        <input type="submit">

        <!-- 普通按钮 -->
        <input type="button" value="按钮">

        <!-- 重置按钮 -->
        <input type="reset">

        <!-- 电子邮件框 -->
        <input type="email" autofocus>
        <br><br>

        <button type="submit" >提交</button>
        <button type="reset">重置</button>
        <button type="button">按钮</button>





    </form>
</body>
</html>